Yes - I ordered both. I also ordered the L3s, but I plan to test/run a setup using just the L3t/L3m combination. I plan to run an acoustic guitar and vocal mic into the L3t mixer, and also an HD500 with JTV59 into the Aux inputs on the L3t back panel. The L3m will be set up vertically so the two speakers will work with L6 Link as a stereo pair. No promises as to when I may get around to reporting on this specific setup - I will probably just be having too much fun at the beginning to think about reporting.

Edit: Actually, I ordered 2 L3t speakers - not an L3m. But I do intend to run the above setup using only the inputs on one L3t. The second L3t is going to run just as a speaker for now, so it will behave exactly as the L3m would. I just wanted the second mixer for future expansion (e.g. a duo/trio) so I ordered 2 L3t's rather than one of each. To extrapolate on your original question, I would expect to be able to use all the inputs on both L3t units, connect them to each other via L6 Link in both directions, and have L6 Link treat them as a stereo pair, sending all EQ'ed and FX'ed signals from each to the other, in full stereo. Technically this should support 2 acoustic guitarists, 2 vocalists, and two additional stereo inputs (e.g. two Pod guitarists, or one electric guitarist and one keyboard player). We'll see.